Add the streamListen and streamCancel rpcs to the vm service.

runtime/include/dart_api.h

 /*
  * Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
  * for details. All rights reserved. Use of this source code is governed by a
  * BSD-style license that can be found in the LICENSE file.
  */
 
 #ifndef INCLUDE_DART_API_H_
 #define INCLUDE_DART_API_H_
 
 /** \mainpage Dart Embedding API Reference
@@ skipping 2799 matching lines @@
  * pointer will be freed by the VM by calling free.
  */
 typedef const char* (*Dart_ServiceRequestCallback)(
     const char* method,
     const char** param_keys,
     const char** param_values,
     intptr_t num_params,
     void* user_data);
 
 /**
- * Register a Dart_ServiceRequestCallback to be called to handle requests
- * with name on a specific isolate. The callback will be invoked with the
- * current isolate set to the request target.
+ * Register a Dart_ServiceRequestCallback to be called to handle
+ * requests for the named rpc on a specific isolate. The callback will
+ * be invoked with the current isolate set to the request target.
  *
- * \param name The name of the command that this callback is responsible for.
+ * \param method The name of the method that this callback is responsible for.
  * \param callback The callback to invoke.
  * \param user_data The user data passed to the callback.
  *
- * NOTE: If multiple callbacks with the same name are registered, only the
- * last callback registered will be remembered.
+ * NOTE: If multiple callbacks with the same name are registered, only
+ * the last callback registered will be remembered.
  */
 DART_EXPORT void Dart_RegisterIsolateServiceRequestCallback(
-    const char* name,
+    const char* method,
     Dart_ServiceRequestCallback callback,
     void* user_data);
 
 /**
- * Register a Dart_ServiceRequestCallback to be called to handle requests
- * with name. The callback will be invoked without a current isolate.
+ * Register a Dart_ServiceRequestCallback to be called to handle
+ * requests for the named rpc. The callback will be invoked without a
+ * current isolate.
  *
- * \param name The name of the command that this callback is responsible for.
+ * \param method The name of the command that this callback is responsible for.
  * \param callback The callback to invoke.
  * \param user_data The user data passed to the callback.
  *
- * NOTE: If multiple callbacks with the same name are registered, only the
- * last callback registered will be remembered.
+ * NOTE: If multiple callbacks with the same name are registered, only
+ * the last callback registered will be remembered.
  */
 DART_EXPORT void Dart_RegisterRootServiceRequestCallback(
-    const char* name,
+    const char* method,
     Dart_ServiceRequestCallback callback,
     void* user_data);
 
 
 #endif  /* INCLUDE_DART_API_H_ */  /* NOLINT */